Transcend Information TS16GSDHC 6 ~32GB High Capacity Secure Digital Card Register Information

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SDHC Card series

4~32GB High Capacity Secure Digital Card

Register Information

Within the card interface six registers are defined: OCR, CID, CSD, RCA, DSR and SCR. These can be accessed only by corresponding commands (see Chapter 4.7). The OCR, CID, CSD and SCR registers carry the card/content specific information, while the RCA and DSR registers are configuration registers storing actual configuration parameters.

1. OCR register

The 32-bit operation conditions register stores the VDD voltage profile of the card. Additionally, this register includes status information bits. One status bit is set if the card power up procedure has been finished. This register includes another status bit indicating the card capacity status after set power up status bit. The OCR register shall be implemented by the cards. The 32-bit operation conditions register stores the VDD voltage profile of the card. Bit 7 of OCR is newly defined for Dual Voltage Card and set to 0 in default. If a Dual Voltage Card does not receive CMD8, OCR bit 7 in the response indicates 0, and the Dual Voltage Card which received CMD8, sets this bit to 1.

Additionally, this register includes 2 more status information bits. Bit 31 - Card power up status bit, this status bit is set if the card power up procedure has been finished. Bit 30 - Card capacity status bit, this status bit is set to 1 if card is High Capacity SD Memory Card. 0 indicates that the card is Standard Capacity SD Memory Card. The Card Capacity status bit is valid after the card power up procedure is completed and the card power up status bit is set to 1. The Host shall read this status bit to identify a Standard or High Capacity SD Memory Card.

The OCR register shall be implemented by the cards.

OCR Register Definition

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Contents Pin Definition Placement Features~32GB High Capacity Secure Digital Card Description ~32GB High Capacity Secure Digital Card Architecture Current Consumption Power Supply VoltageBus Signal Line Load ~32GB High Capacity Secure Digital Card Parameter Symbol Min Max Unit Remark ~32GB High Capacity Secure Digital Card Bus Signal Levels~32GB High Capacity Secure Digital Card Bus Timing Output Delay time during Data Transfer Mode MHz Ccard ≤ 10 pF, 1 card Clock low time Output Hold time Sdhc Card series OCR register ~32GB High Capacity Secure Digital Card Register InformationPNM CID RegisterMID OIDCSD Register PSNMDT CRCCSD Register Fields CSD Version CsdstructureTranspeed TaacNsac Writeblkmisalign CCCReadbllen ReadblpartialSectorsize WpgrpenableCsize EraseblkenFileformat CopyPermwriteprotect TmpwriteprotectDSR Register Optional RCA RegisterDatastataftererase SCR RegisterScrstructure SdspecSdbuswidths SdsecurityMechanical Dimension Sdhc Card series Sdhc Card series
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